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Latent Heat Flux Profiles from Collocated Airborne Water Vapor and Wind Lidars during IHOP_2002

Kiemle, Christoph and Brewer, Alan and Ehret, Gerhard and Hardesty, Michael and Fix, Andreas and Senff, Christoph and Wirth, Martin and Poberaj, Gorazd and LeMone, Margaret (2007) Latent Heat Flux Profiles from Collocated Airborne Water Vapor and Wind Lidars during IHOP_2002. Journal of Atmospheric and Oceanic Technology, 24, pp. 627-639. DOI: 10.1175/JTECH1997.1.

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Abstract

Latent heat flux profiles in the convective boundary layer (CBL) are obtained for the first time with the combination of the DLR water vapor differential absorption lidar (DIAL) and the NOAA high resolution Doppler wind lidar (HRDL). Both instruments were integrated nadir viewing on board the DLR “Falcon” research aircraft during the International H2O Project (IHOP_2002) over the U.S. Southern Great Plains. Flux profiles from 300 – 2500 m AGL are computed from high spatial resolution (150 m horizontal and vertical) two-dimensional water vapor and vertical velocity lidar cross sections using the eddy covariance technique. All cospectra show significant contributions to the flux between 1 and 10 km wavelength, with peaks between 2 and 6 km, originating from large eddies. The main flux uncertainty is due to low sampling (55 % rmse at mid-CBL), while instrument noise (15 %) and systematic errors (7 %) play a minor role. The combination of a water vapor and a wind lidar on an aircraft appears as an attractive new tool that allows measuring latent heat flux profiles from a single over-flight of the investigated area.

Document Type:Article
Title:Latent Heat Flux Profiles from Collocated Airborne Water Vapor and Wind Lidars during IHOP_2002
Authors:
AuthorsInstitution or Email of Authors
Kiemle, ChristophUNSPECIFIED
Brewer, AlanNOAA ETL, Washington, USA
Ehret, GerhardUNSPECIFIED
Hardesty, MichaelNOAA ETL, Washington, USA
Fix, AndreasUNSPECIFIED
Senff, ChristophNOAA ETL, Washington, USA
Wirth, MartinUNSPECIFIED
Poberaj, GorazdETH Zürich, Zürich, CH
LeMone, MargaretNCAR EOL, Boulder, CO, USA
Date:2007
Journal or Publication Title:Journal of Atmospheric and Oceanic Technology
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:24
DOI:10.1175/JTECH1997.1
Page Range:pp. 627-639
Status:Published
Keywords:airborne lidar, latent heat flux, convective boundary layer, water vapor
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben LIDAR-Forschung und -Entwicklung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Dr.rer.nat. Christoph Kiemle
Deposited On:25 Apr 2007
Last Modified:20 Oct 2014 14:31

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